Halogen bonding in 1,2-dibromo-4,5-dimethoxy-benzene and 1,2-diiodo-4,5-dimethoxy-benzene

En:

Acta Crystallogr Sect C Cryst Struct Commun 2008;64(11):o604-o608

Fecha:

2008

Formato:

application/pdf

Tipo de documento:

info:eu-repo/semantics/article
info:ar-repo/semantics/artículo
info:eu-repo/semantics/publishedVersion

Descriptores:

Benzene -  Bromine compounds -  Halogen compounds -  Asymmetric units -  C links -  Columnar arrays -  Halogen bondings -  Linear chains -  Spatial organizations

Descripción:

An interesting case of 'halogen-bonding-promoted' crystal structure architecture is presented. The two title compounds, C8H8Br2O2 and C8H8I2O2, have almost indistinguishable mol-ecular structures but very different spatial organization, and this is mainly due to differences in the halogen-bonding inter-actions in which the different species present, i.e. Br and I, take part. The dibromo structure exhibits a π-bonded columnar array involving all four independent mol-ecules in the asymmetric unit, with inter-columnar inter-actions governed by C - Br⋯Br - C links and with no C - Br⋯O/N inter-actions present. In the diiodo structure, instead, the C - I⋯O synthon prevails, defining linear chains, in turn inter-linked by C - I⋯I - C inter-actions. © 2008 International Union of Crystallography.
Fil:Cukiernik, F.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Zelcer, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.

Identificador(es):

http://hdl.handle.net/20.500.12110/paper_01082701_v64_n11_po604_Cukiernik

Derechos:

info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/2.5/ar